USB Killer is a device in the form of a flash memory, but it does not contain memory to store files. Rather, it is made up of capacitors that take an electrical current from the device, and return it with a voltage of up to 220 volts.

It destroys any device that contains or is connected to a USB port, such as computers, PlayStation, car stereos, smartphones, etc. An Indian student named Akuthota at Saint Rose College in New York destroyed 66 computers with a USB Killer.